I oocasionally get an error msg "The connection was interrupted" with some reasons. Usually a reload works but sometimes I need to change the https to http to get the load.

The error msg states the site may be tempo unavailable or that I have a network problem; even trying to open a new tab will give me the same error. When I attempt to load my own website I get the "unsafe site" msg but switching to http from https allows my site to load. I can open a tab in Firefox ten times without a problem and then I'll get "The connection was interrupted" msg. I did a complete delete and reload of Firefox but the issue remains.